- the effect of caffeine on heart rate the aim of this experiment was to test the effect of caffeine on the heart rate of a daphinia (water fleas) hypothesis: i prediction for this experiment is that an increase in caffeine on daphinia will increase the heart rate because caffeine is a stimulant drug that increases the activity of the nervous. Daphnia lab heart rate lab report report heart rate uc personal the format for the entire lab report is summarized in the handout of laboratory requirements results of the few studies done on the effects of kava on the. Daphnia's transparent body and large heart make it ideal for physiological studies let us show you how to set up a popular heart rate measurement experiment using daphnia magna. In this experiment, the effect of temperature and chemicals on the heart rate of a daphnia magna is observed the heart is readily observed in the experiment because d magna is transparent the heart is readily observed in the experiment because d magna is transparent. The results show the heart rate of daphnia is positively affected by the presence of caffeine, and it is increased when the concentration of caffeine solution is raised the average heart rate of daphnia under normal condition which acts as a control experiment is 114 heart beats per minute.
This experiment can also be performed using caffeine, nicotine or adrenaline, each producing an increase in the heart rate  due to its intermediate size, daphnia utilizes both diffusion and circulatory methods, producing hemoglobin in low-oxygen environments. Daphnia heart rate - lab report essay introduction: caffeine is a stimulant which is derived from leaves, flowers and seeds of plants - daphnia heart rate - lab report essay introduction.
Daphnia and additives lab purpose the purpose of this lab is to test what effect of nicotine, acetylcholine, epinephrine, caffeine, and ethanol on an organism's heart rate. Closed circulatory system, chambered heart, heart rate, caffeine (or other target chemical) culture prep: after you receive your daphnia, either in the mail or from the store, put them in a clean glass jar and add distilled room temperature water until full. Daphnia heartbeating, recorded using a canon eos 7d and a leica compound microscope at approximately 100x magnification.
The q10 as well as the average heart rates at different temperatures provided evidence that supported the hypothesis that temperature would affect daphnia heart rate too at the temperature interval of 4°c to 14°c, the q10 was found to be 131 (table 1. This video is a step-by-step guide to properly observing daphnia heart rates in different temperatures and with different chemicals.
In this experiment on the crustacean, daphnia, tudents must collect data on how daphnia respond to changes in their environment take a sample daphnia and expose it to 1% ethanol and count the heart rate by observing the crustacean under a microscope. Daphnia have an open blood circulation the heart is located dorsally and anterior from the brood chamberat 20ºc, it beats about 200 times per minute, slowing down at lower temperatures. Ideally, your experiment will span the entire range of concentrations that produce a response (ie, change in daphnia heart rate) in the pilot experiment, you can test fewer individuals, and spread your test concentrations fairly widely (eg, serial 10-fold dilutions. In this experiment i aim to find out if caffeine has an effect on the heart rate of daphnia daphnia are water fleas that have a sort of heart that we can see in magnification we can count the number of heart beats in a minute of a regular daphnia and try and get a new one with the same specifications as the old one that may have died.
Abstract students commonly test the effects of chemical agents on the heart rate of the crustacean daphnia magna, but the procedure has never been optimized we determined the effects of three concentrations of ethanol, nicotine, and caffeine and of a control solution on heart rate in daphnia. Daphnia is a group of aquatic crustaceans, commonly called water fleas during this experiment, three daphnia's heart rate were observed in three different temperatures of water it was found that the cooler the water was, the heart rate was slower than in the hotter temperature regardless of the. Since the effects of temperature on a metabolic rate may be expressed in terms of the q10, in this experiment, we studied the effects of a change in temperature on daphnia metabolic or heart rate our results showed there was an increase in daphnia heart rate with increasing temperature.